This listing is for a New Outboard Extension Kit manufactured by Bay Manufacturing. This spacer kit adds 5 inches to your Mercury 100–115 HP 4-Stroke outboard and is engineered to OEM-level fit and durability.
Some newer model spacers arrive painted black, while others feature an unpainted sandblasted finish.
⚠️ This S-Model kit does NOT include a driveshaft extension.
If you require a driveshaft extension, the standard non-S version of the kit must be used (ordered through a Mercury dealer). This kit supplies all other required components.
Product Features
- Fits Mercury 75, 90, 100, 115 HP 4-Stroke (1.7L engines)
- Adds 5 inches of shaft length
- Durable construction for long-term performance
- Includes required hardware for installation (except driveshaft extension)
- Designed for engines requiring the 414S specification
Included in Kit
- (1) 5″ Extension Housing
- (1) 5″ Shift Shaft
- (1) 5″ Water Tube
- (4) Studs & Nuts
- (1) Water Sleeve
Additional Information
- Does NOT include driveshaft extension
- Backed by a 1-year manufacturer warranty
- Some kits may arrive painted; others unpainted
- These items are not returnable except for warranty claims
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal request for any additional charges.
(Some items may not qualify for international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com
Please include your engine model or serial number to help confirm proper fitment before ordering.
